Hatsujou
Jinguuji, who‘s not coming to school, is the most “talented“ in his grade. To get this son of a yakuza to attend lessons, Yuuki, the assistant teacher in charge visits him at home. But when Yuuki gets the attention of Jinguuji, who is with a girl, the latter suddenly gets aroused and forces Yuuki to sleep with him....! Is there a “family secret“ Yuuki‘s not allowed to know hidden in the ferocious eyes of Jinguuji who‘s devouring Yuuki‘s body---?
Sensei Nante Kirai Desu.
One day Ikuta Aoi made his crush mad when he tried to confess. However, he was forced to open up to his Social Studies teacher, Shizu, and when he finds out that his crush likes Shizu he is brokenhearted. He decides to properly confess to her and, thanks to Shizu's backing, Aoi is able to, and he reluctantly apologizes to Shizu for being rude to him. Even though things should be over, he is forced to be Shizu's servant as punishment.
Food Chain
http://www.lezhin.com/ko/comic/gayteacher During the day Myeongmungo is a plain teacher, but at night he turns into a gay playboy eating up cute boys! He enjoys his double life to the fullest, untill one day he gets discovered by the grandson of the school chairman! What will come out of that!? Can there be any more misfortune awaiting him?
Yareba Dekirusa
Abe Tetsu is a Math teacher at a cram school and is loved by many students, but only the student Miyahara Sunao is always cold with him. The story begins when Abe is tasked with helping Sunao improve his pathetic Math scores for the upcoming mock exam. Raws: http://www.77mh.com/colist_229155.html
Namida Hanamizu Gusyogusyo Danshi